[jira] [Created] (FALCON-1963) Falcon CLI should provide detailed hints if the user's command is invalid

[Ying Zheng (JIRA)]

Ying Zheng created FALCON-1963:
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             Summary: Falcon CLI should provide detailed hints if the user's 
command is invalid
                 Key: FALCON-1963
                 URL: https://issues.apache.org/jira/browse/FALCON-1963
             Project: Falcon
          Issue Type: Bug
            Reporter: Ying Zheng
            Assignee: Ying Zheng


Falcon CLI shows "ERROR: Invalid extension command" if the user's command is 
invalid. Should provide detailed hints, i.e. valid commands.



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